PLATE XXV. 



PAGE 



Fig. 1. Pleurotoma (Surcula) gypsata, u. sp. . . . . . 297 



a. The natural size. | b. The apex, enlarged. 



Fig. 2. Pleurotoma (Surcula) plebeia, n. sp. . . . . 292 



a. The natural size. | b. The sculpture, enlarged. 



Fig. 3. Pleurotoma (Typldomangelia) paupera, u. sp. . . . 317 



a. The natural size. | b. The sculpture, enlarged. 



Fig. 4. Pleurotoma (Typldomangelia) fluctuosa, n. sp. . . .319 



a, b. The shell, natural size. 



c. The apex, enlarged. 



d. The sculpture, enlarged. 



e. The operculum, enlarged. 

 /. Natural size of the same. 



Fig. 5. Pleurotoma (Surcula) trilix, n. sp. . . . . . 287 



a. The shell, natural size. e. The sculpture, enlarged. 



b. The apex, enlarged. 



Fig. 6. Pleurotoma (Typhlomangelia) pyrrha, u. sp. . . . .316 



a, b. The shell, natural size. | c. The sculpture, enlarged. 



Fig. 7. Pleurotoma (Spirotropis) studeriana, v. Mart. .... 322 



(Copied from Professor v. Martens' Conchologische Mittheilungen, vol. i. pt. 3, pi. viii. fig. 3.) 

 a, b. The shell, natural size. | c. The apex, enlarged. 



Fig. 8. Pleurotoma (Thesbia) corpulenta, n. sp. . . . . . 331 



a. The natural size. | fr. The shell, enlarged. 



Fig. 9. Pleurotoma (Spirotropis) bulbacea, n. sp. .... 335 



a. The natural size. 



b. The shell, enlarged. 



c. The operculum, magnified 10 diameters. 



Fig. 10. Pleurotoma (Surcula) hemimeres, n. sp. . . . .294 



a. The natural size. | b. The shell, enlarged 



Fig. 11. Pleurotoma (Tliesbia) translucida, u. sp. . . . . 330 



a. The natural size. | b. The shell, enlarged. 





